package com.ruoyi.framework.config;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import javax.sql.DataSource;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.Primary;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import com.ruoyi.common.enums.DataSourceType;
import com.ruoyi.common.utils.spring.SpringUtils;
import com.ruoyi.framework.config.properties.DruidProperties;
import com.ruoyi.framework.datasource.DynamicDataSource;

/**
 * druid 配置多数据源
 * 
 * @author ruoyi
 */
@Configuration
public class DruidConfig
{
    @Bean
    @ConfigurationProperties("spring.datasource.druid.master")
    public DataSource masterDataSource(DruidProperties druidProperties)
    {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.slave")
    @ConditionalOnProperty(prefix = "spring.datasource.druid.slave", name = "enabled", havingValue = "true")
    public DataSource slaveDataSource(DruidProperties druidProperties)
    {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean(name = "dynamicDataSource")
    @Primary
    public DynamicDataSource dataSource(DataSource masterDataSource)
    {
        Map<Object, Object> targetDataSources = new HashMap<>();
        targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);
        setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");
        return new DynamicDataSource(masterDataSource, targetDataSources);
    }

    /**
     * 设置数据源
     *
     * @param targetDataSources 备选数据源集合
     * @param sourceName 数据源名称
     * @param beanName bean名称
     */
    public void setDataSource(Map<Object, Object> targetDataSources, String sourceName, String beanName)
    {
        try
        {
            DataSource dataSource = SpringUtils.getBean(beanName);
            targetDataSources.put(sourceName, dataSource);
        }
        catch (Exception e)
        {
        }
    }

    /**
     * 去除监控页面底部的广告
     */
    //@SuppressWarnings({ "rawtypes", "unchecked" })
    //@Bean
    //@ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
    //public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties)
    //{
    //    // 获取web监控页面的参数
    //    DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
    //    // 提取common.js的配置路径
    //    String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
    //    String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
    //    final String filePath = "support/http/resources/js/common.js";
    //    // 创建filter进行过滤
    //    Filter filter = new Filter()
    //    {
    //        @Override
    //        public void init(jakarta.servlet.FilterConfig filterConfig) throws ServletException
    //        {
    //        }
    //        @Override
    //        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
    //                throws IOException, ServletException
    //        {
    //            chain.doFilter(request, response);
    //            // 重置缓冲区，响应头不会被重置
    //            response.resetBuffer();
    //            // 获取common.js
    //            String text = Utils.readFromResource(filePath);
    //            // 正则替换banner, 除去底部的广告信息
    //            text = text.replaceAll("<a.*?banner\"></a><br/>", "");
    //            text = text.replaceAll("powered.*?shrek.wang</a>", "");
    //            response.getWriter().write(text);
    //        }
    //        @Override
    //        public void destroy()
    //        {
    //        }
    //    };
    //    FilterRegistrationBean registrationBean = new FilterRegistrationBean();
    //    registrationBean.setFilter(filter);
    //    registrationBean.addUrlPatterns(commonJsPattern);
    //    return registrationBean;
    //}
}
